How do I use these combinations?

Use the dominant color for large areas, its complementary color for accents, and lighter tints for backgrounds — then check the text pair in the contrast checker.

Starting color

DukeBlue

#00009C · rgb(0, 0, 156) · hsl(240, 100%, 31%)

Complementary colors

#00009e · #9e9e00

Analogous colors

#004f9e · #00009e · #4f009e

Triadic colors

#00009e · #9e0000 · #009e00

Split-complementary colors

#00009e · #9e4f00 · #4f9e00

Tetradic colors

#00009e · #9e004f · #9e9e00 · #009e4f

Monochromatic colors

#00004d · #0000a3 · #0000ff · #5c5cff · #b3b3ff

Ready-made palettes with DukeBlue

Complementary palette

The base color paired with its opposite on the wheel for maximum contrast, plus two neutrals and a soft tint.

#00009C · #9e9e00 · #2a2af4 · #f4f4f5 · #18181b

Analogous palette

Neighboring hues on the color wheel create a calm, cohesive scheme with a light tint and a deep shade.

#004f9e · #00009C · #4f009e · #2a2af4 · #00001f

Triadic palette

Three hues spaced evenly around the wheel for a bold, balanced palette anchored by two neutrals.

#00009C · #9e0000 · #009e00 · #f4f4f5 · #18181b

Monochromatic palette

A single hue stepped from light to dark for a clean, elegant and foolproof palette.

#ebebff · #7a7aff · #0505ff · #000094 · #00001f

Explore DukeBlue Explore on the color wheel Generate a palette

If you are wondering what colors go with DukeBlue, start with its opposite on the wheel — a complementary #9e9e00 — then soften the pairing with the analogous, triadic and monochromatic schemes above.

Frequently asked questions

DukeBlue's complementary color is #9e9e00. Analogous neighbors, triadic accents and monochromatic tints of the same hue all pair naturally with it too.

Must-know facts

Every swatch row is a complete scheme you can copy straight into CSS.
The color wheel can regenerate these harmonies for any base you like.

Related tools

These color tools pair naturally with the one you just used — keep exploring.

Color ChartsExplore Tailwind, Material and web-safe reference charts.Color PickerPick, fine-tune and copy any color in HEX, RGB or HSL.Contrast CheckerCheck WCAG AA and AAA contrast ratios instantly.